<html>
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
		.parent div{
			border:solid 1px #000;
			background-color: #ccc;
		}
		.parent .one{
			background:#f00;
			float:right;
			height: 200px;
			width: 30px;
		}
		.parent .two{
			height: 100px;
			width: 200px;
			float:right;
		}
		.parent .three{
			background-color: #0f0;
			height: 50px;
			width: 100px;
			float:right;
		}
	</style>
</head>
<body>
	<div class="parent">
		<div class="one"></div>
		<div class="two"></div>
		<div class="three"></div>
	</div>
</body>
</html>